Method of spinning, spooling, and stretch texturing polyester filaments and polyesters thereby produced

摘要

The present invention comprises a process for producing and spooling preoriented polyester filaments comprising at least 90 weight % (relative to the total weight of the polyester filaments) polybutylene terephthalate (PBT) and/or polytrimethylene terephthalate (PTMT), preferably of PTMT, wherein, a) the spinning delay is set in the range of 70 to 500; b) the filaments, immediately after exiting from the spinning nozzle, pass through a cooling delay zone from 30 mm to 200 mm in length; c) the filaments are cooled off to below the solidification temperature; d) the filaments are bundled at a distance of between 500 mm and 2500 mm from the lower side of the nozzle; e) the tension of the thread in front of and behind the removal galettes is set to between 0.05 cN/dtex to 0.20 cN/dtex; f) the thread is spooled with a tension of the thread of between 0.025 cN/dtex to 0.15 cN/dtex; g) the spooling speed is adjusted to between 2200 m/min. and 6000 m/min.; h) and from 0.05 weight % to 2.5 weight % (relative to the total weight of the filament) of an additive polymer is mixed as an expansion-promoting agent.